[1066AD]

These animals had to be put down, as there was no practical way to retrain them.

Some years ago a documentary film was made in which a "black" dog was in fact retrained out of that focus but it was never aired, channel chickened out.

[lee martell]

Good for that dog, but rare is the person willing to take that chance. Someone who raised Wolf-Dog hybrids is that type of person.
Some folks like being in the presence of something wild enough to kill them at any time and for any reason.